import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: wwy
 * Date: 2024-05-01
 * Time: 14:35
 */
public class YiDeGeShu {
        public static void main(String[] args) {
                Scanner scanner=new Scanner(System.in);
                        int n= scanner.nextInt();
                int count=0;
                while(n!=0){
                      n=n&(n-1);
                      count++;
                }
                System.out.println(count);
        }
}
